document.write( "Question 1189536: A motorboat travels 343 kilometers in 7 hours going upstream and 819 kilometers in 9 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? \n" ); document.write( "
Algebra.Com's Answer #820928 by ikleyn(52861)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "            This info is to the composer of this problem.\r
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\n" ); document.write( "\n" ); document.write( "For a flat river, typical rate of the current is usually not more than 5 kilometers per hour.\r
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\n" ); document.write( "\n" ); document.write( "The rate of the current of 21 km/h is the rate of a mountain river - - - but motorboats do not float mountain rivers.\r
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\n" ); document.write( "\n" ); document.write( "            This my message is written to save you from blunders.\r
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